title: Ultrafast three-photon counting in a photomultiplier tube.
abstract: We demonstrate experimentally ultrafast three-photon counting by three-photon absorption in a GaAsP photomultiplier tube at the wavelength range of 1800-1900 nm, and analyze its sensitivity and time response. Pulse energy of ∼500 fJ is shown to be detectable for ultrafast 170 fs pulses. The presented three-photon counter may serve as a unique tool for ultrafast quantum state characterization as well as for ultrasensitive third-order temporal measurements.
authors.affiliation: Department of Electrical Engineering, Technion, Haifa, Israel. nevet@tx.technion.ac.il
authors.forename: Amir
authors.initials: A
authors.lastname: Nevet
authors.forename: Alex
authors.initials: A
authors.lastname: Hayat
authors.forename: Meir
authors.initials: M
authors.lastname: Orenstein